Electric hammer.



No. 831,482. PATENTED SEPT. 1%; i906. E. SMITH.

ELECTRIC HAMMER.

APPLICATION FILED AUG 8. 1905.

2 san s spr -snmi'r a.

WIT/IE8 :INVENTOR ATTORNE Y8 of Ohio,

UNITED STATES iPAIENyT OFFICE.

ROBERT SMITH, OF A'IIDDLETOWN, OHIO.

ELECTRIC HAMMER.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed August 8,1905. Serial No. 273,239.

To all whom it may concern.-

Be it known that 1, ROBERT SMITH, a citizen of the United States, and a resident of Middletown, in the county of Butler and State have made certain new and mprovements in Electric Hammers, of which the following is a specification.

My invention is an improvement in electric hammers and it consists in certain novel constructions and combinations of parts here" inafter described and claimed In the drawings, Figure l. is a vertical longitudinal section of my lmproved hammer.

Fig. 2 is a view, partly in section, at rig t an.- gles to Fig, 1. Fig. 3 is a detail ofthe cap. Fig. 4 is a'section on the line 4 4 of Fig. 1. Fig. 5 is a detail of the adjusting-screw. Fig. 6 is a vertical longitudinal section of a-inodified form. f

In the present embodiment of my inven' tion I provide a solenoid 1, comprising a sec tion of .brass tubing 2, threaded at each end and having screwed on either end thereof a fiber Washer 3 4, the wire being wound upon the tube between the washers, and a fiber sleeve fitted over the wire between the washers forcompleting the insulating-case. 'l. he -tern11nalsof the solenoid the washers 4 and connected to the contact- Withinthe casing I provided with a diaphragm 11, having inlegral therewith a relatively short core '13, proga e t an?! the points 5 6 oppositely-disposed upon a second Washer 7, also screwed upon the tube and provided' with openings to permit the passage of the contact-points.

he solenoid is slidably mounted in a fiber sleeve 8, and surrounding the second sleeve and extending beyond the BIIClStllGIIOOf is a metallie casing 9. A ring is arranged above the solenoid and vided on its free end with boss or projvc tion 14, of phosphor-bronze or other suitable diamagnetic material, for a purpose to be hereinafter'described.

A pair of insulating-washers l5"'are arran ed in superposed relation centrally of the diaphragm and opposite to the core, being secured to the core by a set- 1 screw 16 engaging perforations in the washers and a screwthreaded oLpemng in the core.

The set-screw is extende as at 1.6". fora purpose to be described hereinafteigrand between the washers are arranged oppositely-disposed spring-contacts 17 18, com rising the trans verse ortion 17*, adaptec normally to one contact-points on the diaphragm, longitudinal portions 17 18 adapt useful 2 are extended through I and the set-screws 26.

ed to remain in sliding contact with a pair of electrodes 19 20, secured to cap 21, fitting within the upper end of the tube, the electrodes beinginsulated from the cap in any suitable manner and connected at their outer ends to the terminal wires 22 of an electric circuit. I

The casing 9 is provided with longitudinal slots through which'exiend set-screws 24, engaging srrew-threaded openings in the ring A similar arrangement is provided for the cap 21, comprising longitudinal slots 25 By the above-described means both the cap and the ring are permitted a slight longitudinal motion within the casing, but retained from rotary motion therein, whereby the contact-springs 17 18 are always maintained in proper alinement wilh the electrodes 19 and 20, a spring 27 being arranged between the and the ring to retain them in proper relation with each other. p

The extended end 16 of the set-screw 16 normally center: with the set-screw 16 traversing a screw-threaded opening in the cap 21, which is encircled between the cap and the set-srrew 1G by a spiral spring 27, having its ends reduced to engage bosses 27' 27 on the set-s row 16 and the inner face of the cap, respectively, a locking-screw 27 en gaging the outer end of the set-screw 16 and theeap for locking theset-screw in its adjusted position. 7

A relatively long core 28 is arranged inthe lower end of the casing and comprises aset-A tion 2'8 of relatively large diameter engaging the inner face of the casing and the core proper, 28 of relatively small diameter normal ly extending within the solenoid.

The outer end the core is provided with an opening 29 for the reception-of a tool, and a spring 30, arranged between the solenoid and the core, normally retains the solenoid in its upper position over the short core and with its contact-points in'engagement with the spring-contacts.

A striking-ring 30, of phosphor-bronze, is arranged upon the lower end of the solenoid, a surface 31 being provided upon the portion of the core of relatively large diameter for coacting tluvrewith. The outer end. of thecore is reduced in diameter, and a collar 32 is secured to the inner face of the casing by setscrews 33 for limiting the outward motion of the core, a second collar 34 being secured. to the core by set-screws 35 forlinnting the inward motion of the core.

. placed bya rubber ring,

terrupts thecircuit.

applied to an electric'hammer, do not choose 1 form of construction where-a reciprocating 4o collar 32 might'be faced with rub er.

- i myinventiontis entirely auton atic'in its acefiicient in' peratio'n and is not liable to eas ily get out oi order.

. plied to a Hammer, it is tion' where a reciprocating motor desirable, as n pumps, brakes, *mers,

each end of a core with arms C, extending throu h slots D in'the I 6'0 sides of the casing, by which the core are adapted to be attached to the :part to be reciprocatedt is allowed to thecore, 30, arranged. between the core and solenoid, 1 normally iiaintains the solenoid in contact with the short core and normally retains the long core in its outward position. For convenience in manipulating the tool a handle 37 is secured to the u per end thereof. I

It will be evident om the description that the solenoid is maintained normally in its outward position and with the co ntact-points 5 and 6 111' contact with the spring-contacts 17 and 18, whereby the circuit is completed. The completion of the circuit through the solenoid tends to draw the core 28 farther into the. solenoid; but since the core is fixed the solenoid is drawn over the core. The core 13 is carried with the solenoid untilthe boss or projection 14 engages the end of the long core, which checks the movement of the short core and allows the solenoid to proceed alone until the striking-ring 30 engages the surface ,31. fAs soon as the solenoid leaves the short core, however,th e circuit is interrupted, and the spiral spring 30 returns the solenoid to its original position. The diamagnetic boss 14 retains the two portionsof the core out of direct contact with each other, thuspermitting' the adjacent ends to retain their opposite polarity. The operation of the hammer is entii'elyautomatic, since the movement of. the solenoid completes and iii- While I havedescribed In invention as to limit myself to this application, since it IS evidentthat it may be made use of in any motor is desired.

If desired, the striki'ng ring 30 may be re thusredu c ng the noise of operation, and r a like urpose the I It will be evident from the descriptiongthat' tion and while simple in construction is yet my invention asalpevident that it mig t. with equal facility be used many coiistruc.,

wouldbe tripham- While I have shown .In Fig. 6 I have shown a modification wherein a solenoid A is arranged to actupon B, the core being provided t e motormay be part, While the/arms E on connected to a fixed In the above con- The collar 34is set-{ and act alternately, in such position that'a slight amount of play solenoids and connections-being in all other I and thespiral spring 3 respects simi'l the construction of the.

ar to that shown in 1.

' The provision of the slotted connection between the cap and the casing 9'allowsthe cup carrying the electrodes to slip out'fr'omthe casing far enough to break the contact between the electrodes and the spring contact-fingers, so that by releasing the handle thecircuit is broken. When the hammer is ers into contact to complete the circuit.

1. In an electric hammer, the combination of a casing, an upper end cap slidablym'ount-' ed within the casing, means for limiting the movement of the cap'with respect to the cas-' ing, oppositely-disposed electrodes project-' ing through the cap and insulated therefrom,

a solenoid slidably mounted'withinthecasing below the cap, and provided with an insulating-casing, a diamagnetic ring secured to the lower end of the solenoid, contactoints co1 1-' nected with the terminals of the so enoid and projecting through the upper end-of the insuletting-case, a ring sl the casing above the solenoid and provided diaphragm and to complete thecirciiit between the i 40 per end of the to the casing, a spring the cap, and with thefsolenoid.

'of the ca the" core ofielative y 'lated therefrom and adapted to make sliding 'struction the solenoids are coupled together with a diaphragm, a relatively short core in idably mounted "within te'g-ral withjthediaphragm and coacting with the solenoid, contact-springs secured to; the insulated therefrom,' and adapted electrodes and the contact-points on the 'so-' lenoid, a secondrelatively lon core slidabl g mounted within-the casin an the solenoid, mean's for'Ii mer t of he core with respect/to the casing, means whereb a toolinay beattached to the outer end .of t e core, a springfo -nprma retainingthe relatively short c'ore atthe u casing, a spring 'for normalijy coacting f .1 miting the m'overetaining the solenoid and the relatively long -.core out-of contact, means'whereby. theposition of the ring may be adjusted with respect electric hammer, the combination a solenoid-movably mounte 2. In n he. with n the casing, ably mounted in one end .of the casing, means tively short core 'slidably' mountedin the opthe movement the upper end of the 's ring-contacts secured to short diameter and insucontact, with the elegtrodes, contact-points" attached to the terminals of the soleno d and between the ringa'n'd. an-electric circuit connected a relatively long core s1 id means for limiting thereof, a cap fitting-within casing andprovided the in r end ot tlie short core and. an electric circuit connected with the solenoid.

3. In apparzitus of the class described, the combination of a casing, 21 solenoid slidahl mounted within the casing, 1- (lianuigne 101 striking-ring on the lower end of the solenoid, a relatively short core slidnhly mounted in one end of the casing and adapted to move with the solenoid, a relatively long coromounted in the lower of the coir, and

provided with eisuri-"oce for amin -ti,

strikirig-ring,12111 electrical car onnec to the solenoid, and means whereby movement of the solenoid may make and break the 4, In apparatus of the cross described, t

not in the e; ei,"

solenoid 1110! combination of e casing, n mounted within the c rin on the lower end th or within the casing below the solenoi vided with a surface for engaging an electric circuit connected with th c A, and nieimswherehy the movement of lenoid may make and break the CUII" 5 In apparatus of the class descr- )ed, the combination of a casing, a solenoio movno mounted within the casing, it dienmgno" ring on the lower end of the solenoid, i re tively long core supported in the casing below the solenoid end fixed with relation tl eto, a relatively short core supported above the solenoid and adopted to more the th, means to restrain the movement of the short 0 core with res ect to the solenoid. a (lliid111 4 v I e netio projection on the inner end of the short core and adapted to contest with the inner end of the short core, an electric circuit connected with the solenoid and means whereby.

the movement of the solenoid may complete I and interrupt the circuit 6. In combination :1 movable solen an electric circuit connected therewith, e dianiagnetic ring on one end of solenoid, n

5o reletively long fixed core having a surface for' engaging'the dimimgnetic ring, a tivelyshort move'ble core, a dienmgnetic projection on the inner end of one ofthe cores, means normally retaining the solenoid in position over the movable core, means whereby the assa e of the current may actuate the solenoid to move over the tired core, means for restraining the movement of the movable core with respee to the solen- .60 oid, means whereby the contact of the solenoid zind short core may con'zplete the circuit, and means whereby the se 'mrntion of the solenoid and the movable core may interrupt the circuit,

7.- combination a movable solenoid. an J i electrical circuit GOliflGO'tBil therewith, diesguetie ring on one end of the solenoid, a rein (l3 long i'ixed core lmving a surface ior wanting-xvi tn the ring, a relatively short movable e ,nnrgnetie boss on the inner end of one oicor s for inner end of th' nielly' retaining t i ziblr, (Lore means in merit of the mo; 1 i. so to the solenoid,and in who: y the ntnct of the solenoid and t 1e moi Mole sore may complate the circuit and whereby their separation may interrupt the circuit."

In combinetion,.n movable solenoid, en

the solen id and of greater the solenoid, and comprising a. ong hxed portion and a relatively A combination, a movable solenoid, 1v l for cozicting therewith, and elatively long fixed portion 7 u short movableportion, diemeans between the adjacent ends 1, core whereby they may retain their polarity, on electric circuit conith the solenoid, means on the short n of core For en aging the solenoid inplete the circuit, means fornornmlly retaining he solenoid in engagement therewith, means avhereby the completion of the circuit may move the solenoid over the fixed "portion and means to limit themotion oi? the movable portion with respect to the solenoid whereby the current is broken.

lii camibinstion n meyehle solenoid, an etric circuit connected therewith, arelaele tivr y short moveble core for coecting with the solenoid, means on the core for engaging the solenoid to complete the circuit, means for normally retaining the solenoid in engage-- ment with the core, means whereby the comoid from engagement with the core, and means for limiting the movement of the core wi respect to the solenoid whereby the airsuit isinterruptetlu s 11 in combination, forming it port of on electric circuit,n twopart core of greater length then the solenoid anting therewitlnnnd comprising at long portion end it relatively short portion, means for norn'ially retaining the solenoid over the short core whereby the cireuit is completed, and means whereby the connected therewith, a. two-e News for normally retaining the solenoid emovzrble solenoid,

pletion oi the current may remove the solen- ,7

' v Fartoore cornpleoion of the oircuib' I fi ey move fhe sole'noidpver. the long core whereby 'the circuit is interrupted.

the solenoid over the short core ma comp- 1 0" plete the circuit, and meia ns where yftki'e movement of the'solenoi'd. over theflong kaore may interrupt the ci x cuit;

BEBT SMITH; V 'Witnes sesfl 4 1 AYRES 'B. BRAMBLE,

I ERNSIG. Ro rz, 

